Spongy spot on older trout boat floor.......

[CAVECLOTH]

Hey guys. I have an older trout boat that hasn't given me any trouble so far. I did notice the floor feels a spongy in places. The last time I hit the river, I noticed some "flex" in the floor and it felt spongy. There aren't any cracks in the floor on cracks on the bottom side either. 

Should I be concerned? I know the floor is supposed to flex some, but I don't know if I should look into having the floor repaired or not. 

The area in question is approximately a 1.5 foot circle.

Please chime in and let me know what ya think.

Thank you!

[fishinwrench]

Go to the hardware store and buy a can or two of "Great Stuff" expanding foam.  Drill a 1/4" hole in the center of the soft spot and blow a bunch of foam in there, then quickly set a concrete block on top of the soft spot to keep it from swelling up too much.   

Don't try to wipe off the excess that oozes back out the hole, or you'll make a mess, just let it set up all the way and then trim/break it off clean. 

[Deadstream]

Again, Wrench proves he is a smart posterior dude

[fishinwrench]

3 hours ago, Deadstream said:

Again, Wrench proves he is a smart posterior dude

Uh naw,  hmm um. 🙅‍♂️

[snagged in outlet 3]

13 minutes ago, fishinwrench said:

Uh naw,  hmm um. 🙅‍♂️

Boat ninja!

[CAVECLOTH]

DONE!!! Worked like a charm. Thanks Wrench!!!

[fishinwrench]

YW 👍

[Terrierman]

1 hour ago, CAVECLOTH said:

DONE!!! Worked like a charm. Thanks Wrench!!!

It will last for a year maybe two.  Then you will need to make a real repair with new wood.  But still, worth it.

[fishinwrench]

6 hours ago, Terrierman said:

It will last for a year maybe two.  Then you will need to make a real repair with new wood.  But still, worth it.

If the floor gets soft again, just add another shot of foam wherever you need it.   It isn't like it's adding any weight to it, and since it's under the flooring it isn't gonna get waterlogged.     

If and when you do decide to replace the whole floor, you'll want to fill all the voids between the stringers with foam anyway.   Every good boat on the market is built that way.